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Open AccessArticle

Mechanical Behaviors of a Symmetrical Bolt Fasten Wedge Active Joint for Braced Excavations

Key Laboratory of Urban Security and Disaster Engineering, Ministry of Education, Beijing University of Technology, Beijing 100124, China
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Symmetry 2020, 12(1), 140; https://doi.org/10.3390/sym12010140
Received: 17 December 2019 / Revised: 31 December 2019 / Accepted: 7 January 2020 / Published: 10 January 2020
Joint-failure of steel tube bracing structures usually causes an excavation accident. A symmetrical bolt fasten wedge (BFW) active joint has been innovatively developed in this paper, which overcomes the shortcomings of the traditional steel wedge (SW) active joint. Three full-scale BFW active joint specimens were manufactured for field operation tests. The test results show that the proposed active joint had a good construction feasibility and a wide applicability. After the field operation tests, axial compression experiments were implemented. Meanwhile, a series of numerical simulations were performed. The numerical results agreed with that of the experiments. Both showed that the working principle and mechanical principle of the BFW active joint was reasonable and ingenious; it had outstanding mechanical properties. Overall, the BFW active joint had the advantages of structure and mechanical properties, and it is suitable for popularization and application. View Full-Text
Keywords: bolt fasten wedge active joint; symmetrical; full-scale experiments; field operation tests; numerical analysis bolt fasten wedge active joint; symmetrical; full-scale experiments; field operation tests; numerical analysis
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Zhang, M.; Yang, M.; Li, P.; Gao, Y. Mechanical Behaviors of a Symmetrical Bolt Fasten Wedge Active Joint for Braced Excavations. Symmetry 2020, 12, 140.

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